Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Cash Flows from Operating Activities:
Net Income	$ 43,953	$ 29,709	$ 30,075
Provision for Credit Losses	7,274	5,180	3,381
Depreciation and Amortization	5,418	5,361	6,718
Loss on the Sale of Securities Available-for-Sale	0	3,038	9,097
Net Gain on Equity Securities	(542)	(131)	(9,005)
Loans Originated and Held-for-Sale	(30,510)	(8,986)	491
Proceeds from the Sale of Loans Held-for-Sale	28,705	8,602	32
Net Gains on the Sale of Loans	(819)	(209)	(32)
Net Loss on the Sale or Write-down of Premises and Equipment,     Other Real Estate Owned and Repossessed Assets	288	404	187
Contributions to Pension & Postretirement Plans	(918)	(1,131)	(681)
Deferred Income Tax Expense (Benefit)	193	(789)	1,799
Purchase of Energy Production Tax Credits	(11,241)	0	0
Shares Issued Under the Directors’ Stock Plan	455	495	218
Stock-Based Compensation Expense	683	314	605
Tax Benefit from Exercise of Stock Options	120	34	11
Effect of Swap Agreements	0	0	(2,365)
Net Increase in Other Assets	(2,104)	(8,209)	(29,220)
Net Increase in Other Liabilities	325	787	9,269
Net Cash Provided By Operating Activities	41,280	34,469	20,580
Cash Flows from Investing Activities:
Proceeds from the Sale of Equity Securities	0	0	9,254
Proceeds from the Sale of Securities Available-for-Sale	0	71,962	100,739
Proceeds from the Maturities and Calls of Securities Available-for-Sale	124,122	107,800	70,415
Purchases of Securities Available-for-Sale	(136,605)	(141,856)	(73,623)
Purchases of Equity Securities	0	(2,999)	0
Proceeds from the Maturities and Calls of Securities Held-to-Maturity	51,977	45,238	51,724
Purchases of Securities Held-to-Maturity	(20,797)	(12,364)	(8,209)
Net Increase in Loans	(75,169)	(187,510)	(228,899)
Termination of Fair Value Hedge	(3,017)	0	0
Proceeds from the Sales of Premises and Equipment, Other    Real Estate Owned and Repossessed Assets	3,147	3,326	2,707
Purchase of Premises and Equipment	(5,089)	(5,597)	(7,081)
Net (Increase) Decrease in Federal Home Loan Bank Stock	(19)	696	1,015
Purchase of Bank Owned Life Insurance	0	0	(692)
Acquisition of Whitehall Branch	0	32,354	0
Net Cash Used In Investing Activities	(61,450)	(88,950)	(82,650)
Cash Flows from Financing Activities:
Net Increase in Deposits	111,539	102,684	189,202
Other Borrowings - Advances	0	102,100	256,500
Other Borrowings - Paydowns	(4,335)	(120,000)	(284,800)
Net Cash Collateral Received from Derivative Counterparties	2,680	6,120	0
Termination of Cash Flow Hedge	(1,445)	0	0
Finance Lease Payments	(76)	(61)	(53)
Purchase of Treasury Stock	(10,240)	(6,790)	(3,608)
Shares Issued for Stock Option Exercises, net	256	433	96
Shares Issued Under the Employee Stock Purchase Plan	325	291	120
Shares Issued for Dividend Reinvestment Plans	0	0	472
Cash Dividends Paid	(18,897)	(18,286)	(17,983)
Net Cash Provided By Financing Activities	79,807	66,491	139,946
Net Increase in Cash and Cash Equivalents	59,637	12,010	77,876
Cash and Cash Equivalents at Beginning of Year	154,546	142,536	64,660
Cash and Cash Equivalents at End of Year	214,183	154,546	142,536
Supplemental Disclosures to Statements of Cash Flow Information:
Interest on Deposits and Borrowings	77,209	84,489	51,828
Income Taxes	18,648	8,853	6,644
Non-cash Investing and Financing Activity:
Transfer of Loans to Other Real Estate Owned and Repossessed Assets	2,744	2,447	2,488
Total fair value of commercial loan participation transferred to Other Assets	10,648	0	0
Total fair value of assets acquired in acquisition of Whitehall Branch, net of cash	0	3,819	0
Total fair value of liabilities assumed in acquisition of Whitehall Branch, net of cash	$ 0	$ 37,683	$ 0